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Four-colour photometry of potential dwarf stars of types G0 to K2,selected from the Michigan Spectral Catalogues (Vol. 1-3), has beencarried out. The results are presented in a catalogue containing 4247uvby observations of 3900 stars, all south of δ = -26deg. Theoverall internal rms errors of one observation (transformed to thestandard system) of a program star in the interval 8.5 < V < 10.5are 0.0044, 0.0021, 0.0039, and 0.0059, respectively, in V, b-y, m_1_ ,and c_1_. The purpose of the catalogue, combined with earliercatalogues, is to allow selection of a large, complete, volume-limitedsample of G- and K-type dwarfs, investigate their metallicitydistribution, and compare it to predictions of various models ofgalactic chemical evolution. Future papers in this series will discussthese subjects.
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Osservazione e dati astrometrici
| Costellazione: | Scorpione |
| Ascensione retta: | 16h31m40.10s |
| Declinazione: | -31°39'10.0" |
| Magnitudine apparente: | 8.963 |
| Distanza: | 292.398 parsec |
| Moto proprio RA: | -8.7 |
| Moto proprio Dec: | -7.7 |
| B-T magnitude: | 11.068 |
| V-T magnitude: | 9.137 |
Cataloghi e designazioni:
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